Abstract

SELLES LOPEZ DE CASTRO, María Cristina et al. Evaluation of fluid intake, weight loss and sweat rate in young triathletes. Rev Esp Nutr Hum Diet [online]. 2015, vol.19, n.3, pp.132-139. ISSN 2174-5145.  https://dx.doi.org/10.14306/renhyd.19.3.146.

Introduction: Triathlon is an endurance sport comprising three disciplines: swimming, cycling and running. It is necessary to purpose guidelines in order to avoid dehydration during training or competition and keep good hydration before, during and after physical activity. The aim of this study is to evaluation of fluid intake, weight loss and sweat rate in young triathletes, during different trainings. Material and Methods: A descriptive-observational study in 14 triathletes (7 boys and 7 girls) during a session of swimming, other session of cycling, another session of running. Fluid intake, weight loss, % of total body water, % dehydration and sweat rate, were assessed. Triathletes drank water in their drums of 750 ml and urine measurement was performed in containers. Results: The results of our study following the next order: swimming, cycling and running. Water intake 2.66±1.94ml/min, 7.91±7.69ml/min y 7.08±4.13ml/min in boys and 3.43±1.53ml/min, 6.39±5.36ml/min y 8.33±2.74ml/min in girls; weight loss 0.83±0.5kg, 0.47±0.3kg y 0.98±0.4kg in boys and 0.79±0.3kg, 0.47±0.58kg y 0.28±0.21kg in girls; and sweating rate 4.44±4.9ml/ min, 11.81±6.46ml/min y 5.29±3.13ml/min in boys and 3.89±2.4ml/min, 4.69±4.20ml/min and 7.96±5.06ml/min in girls. Conclusions: The percentage of body water and dehydration, loss of weight and sweat rate were compared with other studies and it's shown that our results are lower than others studies, being below the recommendations of liquid intake in athletes.

Keywords : Dehydration; Sports; Triathlon; Body weight changes; Sweat.

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